<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>

<body>
  <h1>jsonp跨域</h1>
  <button id="btn">点击发送请求</button>
  <script>
    function callback (data){
      console.log('函数执行,参数是',data);
    }

    const obtn = document.getElementById('btn')
    obtn.onclick = function () {
      // 创建script标签
      const oscript = document.createElement('script')
      oscript.src = 'http://127.0.0.1:8080/addInfo?userId=001&cb=callback'
      document.body.appendChild(oscript)
    }
  </script>
</body>

</html>